The North Sea Basin: Early Oligocene to mid-Miocene
The lower limit of this package is defined by the basin-wide sedimentary discontinuity close to the Eocene-Oligocene boundary. This is apparently a combination of a tectonic episode, marked by inversion in areas of the North Sea Basin, with major uplift and erosion in some areas (Chapter 8), and sea-level fall consequent on the Early Oligocene cooling event(s) (Chapter 4). The temporal relationship between these events is difficult to establish owing to the widespread unconformity(ies) in this interval (Figs 72, 76 & 81). The earliest Oligocene sediments overlying this surface are characterized by extensive reworking of Eocene palynomorphs and nannofossils. In extreme cases (e.g. in Denmark), this can present significant problems in identifying the Eocene-Oligocene boundary.
Figures & Tables
This Special Report comprehensively describes the stratigraphy and correlation of the Tertiary (Paleogene-Neogene) rocks of NW Europe and the adjacent Atlantic Ocean and is the summation of fifty years of research on Tertiary sediments by Chris King. His book is essential reading for all geologists who deal with Tertiary rocks across NW Europe, including those in the petroleum industry and geotechnical services as well as academic stratigraphers and palaeontologists.
Introductory sections on chronostratigraphy, biostratigraphy and other methods of dating and correlation are followed by a regional summary of Tertiary sedimentary basins and their framework and an introduction to Tertiary igneous rocks. The third and largest segment comprises the regional stratigraphic summaries. Regions covered are the North Sea Basin, on shore areas of southern England and the eastern English Channel area, the North Atlantic margins (including non-marine basins in the Irish Sea and elsewhere) and the Paleogene igneous rocks of Scotland.